A very interesting trove, quoting the home page : “This is a virtual museum of operating systems (and standalone applications) running under emulation, implemented as a Linux VM for QEMU, VirtualBox, or UTM.”
It allows rapidly trying many old OSes, from the most mysterious Soviet DOS clones, old releases of HP-UX, Lisa OS, etc. Also provides numerous screenshots. An excellent work !
It also popped up on my search today and wanted to post it here. According to the article, " if you can’t spare 174GB of disk space right now, a “Lite” version requires only 21GB and downloads missing files on-demand as you load up particular operating systems."
Andrew Warkentin’s Virtual OS Museum Collects 174GB of Ready-to-Use Vintage Operating Systems - Hackster.io
easiest way to download is the torrent…
$ sudo apt install transmission-cli
but watch out because transmission-cli writes to your home directory unless you use the -w dir option, and you probably won’t notice until your disk gets full! 
$ transmission-cli virtual_os_museum-2026.05.19-full.zip.torrent -w `pwd` 2>&1 &
It’s not very well structured - everything is all in a huge virtual disk image.
22923944448 2026-05-19 11:24 virtual_os_museum-2026.05.19-full/VirtualOSMuseum.utm/Data/host_x86.vdi
162135015936 2026-05-19 11:24 virtual_os_museum-2026.05.19-full/VirtualOSMuseum.utm/Data/guest_images.vdi
Here is the list of all images:
Sadly can’t find EMAS or Mouses…
-G
Indeed, at least not in that archive Mouses is online and works OK (Despite Fiona’s initial warning that the release was known to crash, I’ve never seen it crash…); Bob Eager is still working on EMAS 2900 (and I believe actively working on it, not just a longer term off-and-on project) but he’s the sort of chap to keep quiet until he has something to show, so we wait patiently looking forward to it!
I was a little disappointed not to see our KDF9 Algol work in the collection, or the Atlas. But I guess those are all very niche, it’s nonetheless an impressive piece of work; not just finding them all but building a system where they can be run.
Perhaps had the EARLY British computers made it as micro chip, you would have seen more software.
Did any one conceive of doing that?
Political (that the right word) reasons may have kept other OS’s off the list.
We don’t have the hardware,
We don’t have the software, We don’t care about it, but student John Doe wrote it here, so you can’t have it.please pay $125 to read the 3 page paper online, from 196x.
Algol is important, but alas teaching computer science is getting subjects that brings in new students
but nothing to with last years courses or computers.
The history of British computing is long, complicated and full of disappointments and government+military interventions and maybe even corruption (who knows for sure) (IMO).
We had computers, languages (lookup Corral66 for some fun) and operating systems. Also (maybe surprising) a company in Scotland made hard drives (I used to own one of their 10MB drives in 1981) Also a microprocessor; the Ferranti F100-L and maybe others that the military didn’t want anyone knowing about.
It would be nice to think that one day someone with the energy to research it would do so, but I’m not holding my breath.
-Gordon